FR2445671A1 - Systeme de transmission, par l'intermediaire d'un canal numerique, de signaux telephoniques multiplexes par repartition en frequence - Google Patents

Systeme de transmission, par l'intermediaire d'un canal numerique, de signaux telephoniques multiplexes par repartition en frequence

Info

Publication number
FR2445671A1
FR2445671A1 FR7836758A FR7836758A FR2445671A1 FR 2445671 A1 FR2445671 A1 FR 2445671A1 FR 7836758 A FR7836758 A FR 7836758A FR 7836758 A FR7836758 A FR 7836758A FR 2445671 A1 FR2445671 A1 FR 2445671A1
Authority
FR
France
Prior art keywords
digital channel
telephone signals
frequency division
division multiplex
signals via
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7836758A
Other languages
English (en)
Other versions
FR2445671B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR7836758A priority Critical patent/FR2445671A1/fr
Priority to US06/107,563 priority patent/US4313194A/en
Priority to GB7944449A priority patent/GB2042850B/en
Publication of FR2445671A1 publication Critical patent/FR2445671A1/fr
Application granted granted Critical
Publication of FR2445671B1 publication Critical patent/FR2445671B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J4/00—Combined time-division and frequency-division multiplex systems
    • H04J4/005—Transmultiplexing

Abstract

a. Système de transmission, par l'intermédiaire d'un canal numérique, de signaux téléphoniques multiplexés par répartition en fréquence MRF, et notamment de deux groupes quaternaires de 900 voies de signaux téléphoniques MRF par l'intermédiaire d'un canal numérique d'un debit de 140 Mbit/s. b. Il comporte à l'entrée et à la sortie du canal numérique des moyens de codage adaptatif par bloc. c. Téléphonie.
FR7836758A 1978-12-28 1978-12-28 Systeme de transmission, par l'intermediaire d'un canal numerique, de signaux telephoniques multiplexes par repartition en frequence Granted FR2445671A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7836758A FR2445671A1 (fr) 1978-12-28 1978-12-28 Systeme de transmission, par l'intermediaire d'un canal numerique, de signaux telephoniques multiplexes par repartition en frequence
US06/107,563 US4313194A (en) 1978-12-28 1979-12-27 Transmission system of frequency division multiplex signals on digital links
GB7944449A GB2042850B (en) 1978-12-28 1979-12-28 Transmission system of frequency division multiplex analogue signals on digital links

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7836758A FR2445671A1 (fr) 1978-12-28 1978-12-28 Systeme de transmission, par l'intermediaire d'un canal numerique, de signaux telephoniques multiplexes par repartition en frequence

Publications (2)

Publication Number Publication Date
FR2445671A1 true FR2445671A1 (fr) 1980-07-25
FR2445671B1 FR2445671B1 (fr) 1985-03-15

Family

ID=9216696

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7836758A Granted FR2445671A1 (fr) 1978-12-28 1978-12-28 Systeme de transmission, par l'intermediaire d'un canal numerique, de signaux telephoniques multiplexes par repartition en frequence

Country Status (3)

Country Link
US (1) US4313194A (fr)
FR (1) FR2445671A1 (fr)
GB (1) GB2042850B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8403249A (nl) * 1983-10-25 1985-05-17 Sony Corp Niet-lineaire, digitale accentueringsschakeling.

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498173A (en) * 1982-06-17 1985-02-05 At&T Bell Laboratories Technique for digital split-channel transmission using interpolative coders and decoders
US4933978A (en) * 1986-02-28 1990-06-12 Rca Licensing Corporation Method and apparatus for determining the value of a sample in the mth position of an ordered list of a plurality of samples
FR2685486B1 (fr) * 1991-12-19 1994-07-29 Inst Francais Du Petrole Methode et dispositif pour mesurer les niveaux d'amplitude successifs de signaux recus sur une voie de transmission.
DE4328252C2 (de) * 1993-08-23 1996-02-01 Sennheiser Electronic Verfahren und Vorrichtung zur drahtlosen Übertragung digitaler Audiodaten
TW390082B (en) * 1998-05-26 2000-05-11 Koninkl Philips Electronics Nv Transmission system with adaptive channel encoder and decoder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH461585A (de) * 1966-08-24 1968-08-31 Ciba Geigy Verfahren und Einrichtung zur Nachrichtenübermittlung
FR2221880A1 (en) * 1973-03-14 1974-10-11 Radio Diffusion Tv Francaise Analogue signal compression-decompression using supplementary signal - involves sampling analogue signal before compression to produce digitally coded signal
US3945002A (en) * 1974-10-25 1976-03-16 Bell Telephone Laboratories, Incorporated Block digital processor for use with nonuniformly encoded digital words
US4021652A (en) * 1975-12-11 1977-05-03 Northern Electric Company Limited Incrementally adjustable digital attenuator/amplifier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1593017A (fr) * 1968-09-11 1970-05-25
US4013842A (en) * 1976-04-15 1977-03-22 Bell Telephone Laboratories, Incorporated Method and apparatus for interfacing digital and analog carrier systems
US4193096A (en) * 1977-04-04 1980-03-11 Xerox Corporation Half tone encoder/decoder
US4131766A (en) * 1977-07-11 1978-12-26 Granger Associates Digital filter bank

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH461585A (de) * 1966-08-24 1968-08-31 Ciba Geigy Verfahren und Einrichtung zur Nachrichtenübermittlung
FR2221880A1 (en) * 1973-03-14 1974-10-11 Radio Diffusion Tv Francaise Analogue signal compression-decompression using supplementary signal - involves sampling analogue signal before compression to produce digitally coded signal
US3945002A (en) * 1974-10-25 1976-03-16 Bell Telephone Laboratories, Incorporated Block digital processor for use with nonuniformly encoded digital words
US4021652A (en) * 1975-12-11 1977-05-03 Northern Electric Company Limited Incrementally adjustable digital attenuator/amplifier

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
EXBK/73 *
EXBK/74 *
EXBK/77 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8403249A (nl) * 1983-10-25 1985-05-17 Sony Corp Niet-lineaire, digitale accentueringsschakeling.

Also Published As

Publication number Publication date
FR2445671B1 (fr) 1985-03-15
US4313194A (en) 1982-01-26
GB2042850A (en) 1980-09-24
GB2042850B (en) 1982-12-08

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ST Notification of lapse